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| Content Provider | Springer Nature Link |
|---|---|
| Author | Hernández Mata, Georgina Mellado Rojas, María Elena Richards Lewis, Alan López Bucio, José Beltrán Peña, Elda Soria Bello, Eva Luz |
| Copyright Year | 2010 |
| Abstract | Plants adapt to challenging environmental factors by modulating morphogenetic processes. Although it has been speculated that activation of defense responses against pathogens leads to plant growth adjustment, little is known about developmental and architectural responses to defense stimulators. In this report we evaluated the activity of oligogalacturonides (OGs), a class of molecules directly involved in plant immunity, to modulate root system architecture in Arabidopsis thaliana. We show that OGs induce PAD3 expression and camalexin synthesis, two well-known markers of defense responses. These effects were related to primary root growth inhibition and increased lateral root and root hair formation, which are reminiscent of altered auxin responses. Cellular analysis showed that the effect of these compounds on primary root growth was due to changes in cell elongation and increased flavonoid accumulation at the root elongation region. Moreover, the observations that similar changes in primary root growth were induced by naphthylphthalamic acid supply and that auxin- or flavonoid-related mutants tir1, doc1, pgp1, pgp4, pgp19, and tt4-1 show differential responses to primary root growth inhibition by OGs suggest that auxin homeostasis plays a role in the oligogalacturonide-induced alteration of root cell patterning. Our results suggest that OGs might play a dual function in adaptation of plants to pathogen challenge by inducing defense responses and plant architecture adjustment. |
| Starting Page | 441 |
| Ending Page | 454 |
| Page Count | 14 |
| File Format | |
| ISSN | 07217595 |
| Journal | Journal of Plant Growth Regulation |
| Volume Number | 29 |
| Issue Number | 4 |
| e-ISSN | 14358107 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2010-05-30 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Arabidopsis thaliana Oligogalacturonides Root architecture Flavonoids Auxin transport Auxin signaling Defense responses Camalexin Agriculture Plant Physiology Plant Anatomy/Development Plant Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science Agronomy and Crop Science |
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